// Given an unsorted array nums, reorder it in-place such that nums[0] <= nums[1] >= nums[2] <= nums[3]....

// For example, given nums = [3, 5, 2, 1, 6, 4], one possible answer is [1, 6, 2, 5, 3, 4].

public class Solution {

    public void wiggleSort(int[] nums) {
        
        for(int i = 1; i < nums.length; i++) {
            
            int current = nums[i - 1];
            
            if((i % 2 == 1) == (current > nums[i])) {
                
                nums[i - 1] = nums[i];
                nums[i] = current;
                
            }
            
        }
        
    }

}